Lawrencium (Lr)

Lawrencium is a synthetic chemical element with atomic number 103 in the periodic table. This man-made radioactive actinide metal has not been detected in Earth’s crust yet. A member of the actinide series in the periodic table, lawrencium has three valence electrons on the outer shell that help element 103 participate in the formation of … Read more

Yttrium (Y)

Yttrium is a chemical element with atomic number 39 in the periodic table. This element is the most plentiful rare-earth metal found in the igneous rocks of Earth’s crust after cerium. Being a member of the transition group in the periodic table, this heavy metal has three valence electrons and forms only a few compounds.  … Read more